Try this one on for size: BMW already dropped the full details on both the new M6 coupe and convertible, but only the hardtop makes its debut here at the 2012 Geneva Motor Show. We'll have to wait until the New York expo in April to see the convertible, though oddly, the droptop M6 is the one that will go on sale in the United States first. Alright then.

Regardless of what car launches when, the M6 will no doubt pack a potent punch when it finally hits the street. Powered by BMW's 4.4-liter twin-turbocharged V8, the big coupe (and convertible) will have a whopping 560 horsepower and 500 pound-feet of torque on tap, all of which is sent to the rear wheels via the M division's seven-speed dual-clutch transmission. That means the M6 Coupe will run to 62 miles per hour in just 4.2 seconds with the convertible only lagging behind by a tenth of a second. And while the 2012 M5 will be offered in the U.S. with a proper six-speed manual transmission, there's no word on a row-your-own gearbox for the M6, though our sources have said that it's under consideration (of course).

There's no mention of curb weight for either car, but rest assured, the new M6 has surely shed some pounds versus the less-powerful (and decidedly uglier) E63 model. M-specific 19-inch wheels wrapped in high-performance summer tires come as standard rolling stock, but to better fill out those big wheel wells (and offer better grip on the road), a set of lightweight 20s will be available as an option.

So, it'll be another month before we see the droptop M6, even though it'll officially go on sale this summer as a 2012 model. As for the coupe, we won't see that until later in 2012 badged as a 2013 model. Click through our live gallery to see the new M hotness live from Geneva, and follow the jump for all of the nitty-gritty details in BMW's press blast.Continue reading 2013 BMW M6 brings big power to a big coupe